DIN 1651 45SPb20 Introduce
DIN 1651 45SPb20 is a popular grade of alloy steel used in the automotive, aerospace, marine and medical industries. It is a type of high-carbon steel with a higher chromium content than the standard plain carbon steels. This puts it in a class of its own when it comes to mechanical properties such as strength and ductility. To achieve optimal mechanical properties, the steel must be processed with appropriate heat treatments such as quenching and hardening. Welding can also be carried out with appropriate techniques to ensure that the steel does not embrittle or crack.
Smelting temperature:1333°C - 1375°C
Application:Free-cutting steels; technical delivery conditions
DIN 1651 45SPb20 Material Mechanical Properties
The mechanical properties of the DIN 1651 45SPb20 steel are as follows:
| YieldRp0.2 | ≤ 741 (MPa) |
| TeileRm | ≤ 874 (MPa) |
| ImpactKV/Ku | 24(J) |
| ElongationA | 34% |
| Reduction in cross section on fractureZ | 42% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 244 |
DIN 1651 45SPb20 Material Thermal Properties
The thermal performance parameters of the DIN 1651 45SPb20 steel are as follows:
| Temperature (°C) | 42 | 659 | 161 |
| Modulus of elasticity (GPa) | - | 876 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 24 |
| Thermal conductivity (W/m·°C) | - | 34.3 | 22.2 |
| Specific thermal capacity (J/kg·°C) | - | 223 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.44 | - | - |
| Deity (kg/dm³) | - | - | 133 |
| Poisson’s coefficient, ν | - | - | 244 |